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No. 420,558. I Patented Feb. 4, 1890.

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No. 420,558. Patented Feb. 4, 1890.:

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. WITNESSES 5 6 C QJYLWxQ/B INVENTOR 177/07) By 7168 flttorney.

UNITED STATES PATENT OFFICE.

THOMAS F. KEATING, OF NEW YORK, N. Y., ASSIGNOR, To THE YALE & TOWNEMANUFACTURING COMPANY, oF STAMFORD, CONNECTICUT.

LOCK.

SPECIFICATION forming part of Letters Patent No. 420,558, dated February4, 1890. Application filed August 16, I888. $erial No. 282,873- (Nomodel.)

To all whom it may concern.-

Be it known that I, THOMAS F. KEATING, of the city, ounty, and State ofNew York, have invented certain new and useful Improvements in Locks, ofwhich the following is a specification, reference being had to theaccompanying drawings. 7 g

The object of my invention is to provide a door-fastening with twospring-bolts, both of which may be operated from the inside of a door bymeans of a knob and spindle and only one of which can be operated fromthe outside of the door by such means, the other being provided with alock and key to work it from the outside.

My invention consists in a certain organization of parts, which, afterdescribing in detail by reference to the drawings, I shall succinctlyspecify in my claims.

In the drawings, Figure l is a vertical section of a door with my lockapplied, taken through the lock on the line 1 1 of Fig. 2. Fig. 2 is aplan view of my improved door-lock with the lock-plate removed, so as toexhibit the internal parts in the fastening position. Fig. 3 is a Viewsimilar to Fig. 2, but showing the internal parts in the unfastenedposition. Fig. 4 is aview of the swivelspindle and its divided hub andattached arm. Fig. 5 shows in perspective the different parts of the huband the arm detached from the hub.

Referring to the letters upon the drawings, A indicates a section of adoor;. B, the case of a mortise-lock; O, the rotary plug of atumbler-lock; O, the key; D, a knob and escutcheon-plate; E, the outsideknob; E, the inside knob, and F a swivel-spindle. G indicates anescutcheon, and H a screw-fastening of the escutcheon. I and 1 indicatespring latch-bolts suitable for a snap-lock. Lis the lock wing or sweep.All these parts may be of usual construction.

The two spring latch-bolts, each in itself of ordinary construction, Iconnect operatively and with a swivel-spindle in a peculiar way for thepurposes of my invention.

M indicates a sliding spring-carriage with suitable bearings N N to keepit in place.

O is a stop which limits the forward movement of the carriage.

P P are rods fixed in the carriage, projecting backward and resting insupports Q Q, which serve as abutments to the coiled springs R R aroundthe rods. These springs are ap plied so as to tend to throw the carriageforward. The latch-bolt I, provided with a rod S and a spring T, asusual, is connected with the carriage, so as to slide forward and backwith it, but also so as to slide forward and back independent of it, theCarriage at U acting merely as a support for the bolt-rod and a stop forthe bolt-spring T.

V is a collar fixed on the end of the bolt- .rod, by means of which thebolt is drawn back by the backward movement of the carriage.

WV is a spindlehub divided into two parts, which may work independently,either of which will, when rotated, throw back the carriage M and thelock-bolt I.

IV is that partof the spindle-hub which is next the outside of the door,and WV is that part which is next the inside. To the end of the part issecured an arm X, which, when the part is turned by the spindle, willengage with a plate or lug Y on the end of the spring-rod of thelatch-boltI' and throw the bolt back. Thus by operating the part 7 ofthe spindle-hub both latch-bolts I and I can be thrown back to unfastena door. The swivel-spindle is so adjusted that that part of it withwhich the inside doorknob is connected will operate the part W of thehub and the other part of the spindle will only operate the part IV ofthe hub, and will therefore only throw back latchbolt I.

It is sometimes desirable to adjust the door-fastenings so that the doorcan be opened from both sides by the knobs alone, so Iprovide anordinary pivotal stop Z to fasten back the latch-bolt I, as shown in thedrawings; but when this latch-bolt is not fastened back it is necessaryto use the key 0 of the lock to throw it back from the outside of thedoor. By thus providing a door-fastening with two bolts which may beeither springspindle and split hub with two spring-bolts,

one part of said hub actuating one bolt only and the other part bothbolts, substantially as described. 15

In testimony of all which I have hereunto subscribed my name.

TnoMAs F. KEATING.

lVitnesses:

THOMAS A. REID, MATHEWS D. IIALPIN.

